Works just fine. I cleaned a driveway with it, making it much faster than just the wand. I would do the edges of the driveway with the wand, and then go over the rest with this attachment, then spray down with the wand every 6 feet or so. Go slow and steady, overlap by about 1/4, to hide any lines.
I tried to pressure wash my driveway with the pressure wand that came with my Pressure washer, it is very tedious task to aim and get every spot of the surface. This surface cleaner is like a vacuum cleaner, just slide over the surface and you are good. It was easy to attach to my pressure washer wand. I ended up washing not just my driveway, but also the walkway in front of my home. Very happy with the product.